首先有 |A| = (1/2)*(1/2)*(1/3) = 1/12所以 A* = |A|A^(-1)所以 12A* = 12*(1/12)A^(-1) = A^(-1)所以 (0.5A^2)(-1) = (1/0.5)(A^2)^(-1) = 2(A^(-1))^2所以 (0.5A^2)(-1)12A* - E = 2[A^(-1)]^3 - E.再由A的特征值...